0807.9.4 Differeniate Between A Mixture And A Compound
VOCABULARY:
Pure Subtance- A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition.Which is matter made up of on atom or molecule.
Compound-two or more elements chemically combined. (Note: if a sample of matter is made of atoms of two or more elements joined together, always in the same ratio, then that matter is a compound.)Which is two or more elements linked chemically. Molecule-The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms; a group of like or different atoms held together by chemical forces.Which is a small particle. Chemical Formula-A set of symblos showing what atoms make up a compund.Which is chemical symbols. Subscript-A small number that says how many atoms of an element are in a molecule.Which is # of atoms in element. Mixture-A composition of two or more substances that are not chemically combined with each other and are capable of being separated.Which is two or more substances mixed together. Element-is a pure substance (homogeneous material) that broken down further (decomposed) by ordinary chemical means.Which is a substance made of one atom. heterogeneous-Consisting of dissimilar elements or parts.not homogeneous homogenous-Of or exhibiting homogeny.not heterogeneous
PICTURES:
Microscopic view of molecules of a compound (gas phase).
A compund consists of atoms of two or more different elements bound together,
can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
has properties that are different from its component elements, and
Microscopic view of a mixture of two elements and a compound (gas phase).
A mixture consists of two or more different elements and/or compounds physically intermingled can be separated into its components by physical means, and often retains many of the properties of its components.
=Mixtures are heterogeneous forms of matter. Mixtures are composed of variable proportions of molecules and atoms.Compounds are homogeneous forms of matter. Their constituent elements (atoms and/or ions) are always present in fixed proportions.Element-is a pure substance (homogeneous material) that broken down further (decomposed) by ordinary chemical means.
Holt &Technology 8th Grade Science Book
Tennessee Blueprint TCAP Coach Book
Wikipedia.com
mixtures
1) elements and compounds just mix together to form a mixture
and no new compound is formed.
2)A mixture has a variable composition .
3)A mixture shows the properties of constituent substances
4)The constiuents can be seperated easily byphysical method.
5)They are generally heterogeneous i.e their composition
different points .
6)During the formation of mixture , no energy changes takes
place .
COMPOUNDS
1)Elements react to form a new compound
2)The composition of each new compound is fixed
3)The new substance has totally different properties
4)The constituents can be seperated by chemical or
electrochemical reactions.
5)They are always homogeneous, i.e.they have same composition throughout.
6)During the formation of compound the energy is either
released oeabsorbed.
a compound always results from combination due to cheical change. the chemical properties of substances change when they undergo chemical reaction, that is donation and sharing of bonding electrons. so carbon dioxide is a compound since one carbon atom shares electrons with two oxygen atoms. a mixture demonstrates only changes in the physical properties of the mixing substances. sugar in water only makes the water sweet, but it is still just H20 mixed with molecules of sugar gone extremely tiny due to dissolution. no electron bonding.
mixtures 1) elements and compounds just mix together to form a mixture and no new compound is formed. 2)A mixture has a variable composition . 3)A mixture shows the properties of constituent substances 4)The constiuents can be seperated easily byphysical method. 5)They are generally heterogeneous i.e their composition different points . 6)During the formation of mixture , no energy changes takes place . COMPOUNDS 1)Elements react to form a new compound 2)The composition of each new compound is fixed 3)The new substance has totally different properties 4)The constituents can be seperated by chemical or electrochemical reactions. 5)They are always homogeneous, i.e.they have same composition throughout. 6)During the formation of compound the energy is either released oeabsorbed.
VOCABULARY:
Pure Subtance- A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition.Which is matter made up of on atom or molecule.
Compound-two or more elements chemically combined. (Note: if a sample of matter is made of atoms of two or more elements joined together, always in the same ratio, then that matter is a compound.)Which is two or more elements linked chemically.Molecule-The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms; a group of like or different atoms held together by chemical forces.Which is a small particle.
Chemical Formula-A set of symblos showing what atoms make up a compund.Which is chemical symbols.
Subscript-A small number that says how many atoms of an element are in a molecule.Which is # of atoms in element.
Mixture-A composition of two or more substances that are not chemically combined with each other and are capable of being separated.Which is two or more substances mixed together.
Element-is a pure substance (homogeneous material) that broken down further (decomposed) by ordinary chemical means.Which is a substance made of one atom.
heterogeneous-Consisting of dissimilar elements or parts.not homogeneous
homogenous-Of or exhibiting homogeny.not heterogeneous
PICTURES:
can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
has properties that are different from its component elements, and
=Mixtures are heterogeneous forms of matter. Mixtures are composed of variable proportions of molecules and atoms.Compounds are homogeneous forms of matter. Their constituent elements (atoms and/or ions) are always present in fixed proportions.Element-is a pure substance (homogeneous material) that broken down further (decomposed) by ordinary chemical means.Links:
http://www.chem.purdue.edu/gchelp/atoms/elements.html
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mixtures.html
http://www.aisp.net/vster/elements3.htm
http://www.brainpop.com/science/matter/compoundsandmixtures/preview.weml
http://wiki.answers.com/
References:
Holt &Technology 8th Grade Science BookTennessee Blueprint TCAP Coach Book
Wikipedia.com
mixtures
1) elements and compounds just mix together to form a mixture
and no new compound is formed.
2)A mixture has a variable composition .
3)A mixture shows the properties of constituent substances
4)The constiuents can be seperated easily byphysical method.
5)They are generally heterogeneous i.e their composition
different points .
6)During the formation of mixture , no energy changes takes
place .
COMPOUNDS
1)Elements react to form a new compound
2)The composition of each new compound is fixed
3)The new substance has totally different properties
4)The constituents can be seperated by chemical or
electrochemical reactions.
5)They are always homogeneous, i.e.they have same composition throughout.
6)During the formation of compound the energy is either
released oeabsorbed.
a compound always results from combination due to cheical change. the chemical properties of substances change when they undergo chemical reaction, that is donation and sharing of bonding electrons. so carbon dioxide is a compound since one carbon atom shares electrons with two oxygen atoms. a mixture demonstrates only changes in the physical properties of the mixing substances. sugar in water only makes the water sweet, but it is still just H20 mixed with molecules of sugar gone extremely tiny due to dissolution. no electron bonding.
mixtures 1) elements and compounds just mix together to form a mixture and no new compound is formed. 2)A mixture has a variable composition . 3)A mixture shows the properties of constituent substances 4)The constiuents can be seperated easily byphysical method. 5)They are generally heterogeneous i.e their composition different points . 6)During the formation of mixture , no energy changes takes place . COMPOUNDS 1)Elements react to form a new compound 2)The composition of each new compound is fixed 3)The new substance has totally different properties 4)The constituents can be seperated by chemical or electrochemical reactions. 5)They are always homogeneous, i.e.they have same composition throughout. 6)During the formation of compound the energy is either released oeabsorbed.